The allure of her shaved, smooth vaginal opening gave me an erection… Being called over by my devilish girlfriend's younger sister for unprotected sex again and again was absolutely awful. Kuramoto Susumu PFES-102

[Warranty! Panties exposed! Vagina exposed!] My sister, Zhao, was lying in bed with a fever and needed medicine, so my girlfriend asked me to deliver it. I nervously entered the room and saw Zhao asleep, her panties exposed. The panties were deeply embedded in her vulva, and the clearly visible labia caused my erection. Later, when I went to her house, Zhao said, "Brother, you saw my panties the other day, right? Look, here's the video evidence!"... What?! Zhao had caught me red-handed, and her demands became increasingly outrageous...